Safety device for extractors



Jan. 1v, 1929.

C. W. TERWILLIGER SAFEITY DEVICE FOR EXTRACTORS Filed June 15, lez? 2 sheets-sheet 1 INVENTOR v BY y r Z ATroRNYs I Jan. l, 1929.

c. w. TERWILLIGER SAFETY DEVICE FOR EXTRACTORS 2 Sheets-Sheet 2 Filed June 15, 1927 WI'ILNESSES MMMM ATTORNEYS Patented dan. 1,1929.

nai-tener *tn-tiasl SAFETY DEVICE FOR nxrnnc'rons.

applicati@ nien Jane 15, Y1927. serial No'.'199,o31. y

This invention relates to safety devices for v `preventing the opening of the cover to aV machine while thel interior working parts are inoperation and for preventing the starting 6 of the machine while said cover is opened, thel same being particularly designed for use in connection with centrifugal extractor-s used in laundries.

vOne ofthe principal objects of the present i invention is to provide anl improved'attachment for extractors which eliminates the accidental opening of the cover while the ma.- chine is in operation or the accidental start-- ing of theV machine while the cover is opened.

l5 The invention more specifically contemplates an improved safety attachment for extractors which includes means for locking the cover in a closedcondition, which'means is operable by a governor on the drive .shaft to dispose the same in a locked position when the drive shaft is active.

The invention furthermore coniprehends means for preventing the manipulation of the lever to render the machine activewhen the cover of the machine is ,in'a'n opened condition. v

Other objects reside .in the provision of an improved safety attachment for extractors,'

`which is simple in its construction and mode of operation, which is inexpensive to manufacture and install, and which-is thoroughly reliable and highly efficient in its purpose.-

.l/Vith the above recited and other objectsinf view, reference is hadto the lfollowing de- 3 Fig. 2 is a side elevationv thereof;

the governor constituting 'a part of the safety l attachment and which controls the locking device;

Fig. 4: is a transverse. sectional view taken approximately on the lineA-t of Fig. 3

scription and accompanying`- drawings in lthe machine is at a standstill.

Fig. 3 `is an enlarged sectional view through aries Partnr! orrice.

CHARLES w. rnnwrttrenn, or BROOKLYN, NEW YORK. .Y

Fig. 5 is a plan view of a modified vforni of i.

the invention installed. on an extractor of Ia slightly diferent'type than that illustratedv inFigl; j i

Fig. 6 is a side eleva-tion thereof;

Fig. 7 isv a fragmentary sectional view taken approximately on vthe line '7i-'f7 of Fg5;.. .l p y Fig. 8 'is a fragmentary sectional view taken approximately on the line 8-8` of Fig. 5. l

Referring tothe drawings by characters of *reference7 LA designates theextractor body whichis provided with a cover hing'fedly` connected thereto by the hinge C and adapted ly and rearwardly to an open position.` vA countershaft'D is suitably. supported in rear ofthe extractor andhas secured thereto a main drive pulley E around which arbeit F is trained vleading to and operating the vinterior lmechanism of the extractor (not shown) when the d rive pulley E isrotated with the. shaft D. The shaft Dfcarriesfthe usual live pulley G-andidler pulley H,the`former being secured' to the-shaft D` andthe latter being loosely mounted thereon. A belt'It'rained around a suitable driven velement` (not shown), is shiftable respectively from the pulley G to the pulley H and vice versa by a v to be swung'from its closed position upwardshift-ing means J manually operable by a manipulating lever K which is disposed in rear ofthe cover B and obstructed by said cover 'B when the same is in its open position. OrdinarilyV the operator is required under this practice to swing the cover B forwardly and downwardly to its closedposition before access can be had to thev manipulating lever K to shift the beltI on to the live Vpulley. when Inorder, however, to lock the cover in its closedcondition to prevent'opening of the same while. the machine is in operatioln a swinging latch 10 is fulcrumedat ll'on a suitable bracket l2 andthe nose 13 of said latch is normally disposed out of engagement with a keeper lugll by means of a coiled contractile spring l5 whichis connected respe tively to the arm 16 of the la-tch .and lto a bracket arm 17 of the bracket y12. The arm y16 is Vdisposed in the path of movement of .an axially movable vpush elementlSwhich is con# nected witha movable frame 19 carried by av .sleeve 20. The frame 19 supports a pair of substantially diametrically disposed 'governor elements 21. which are fulcrumed at 22. to

"the frame and l'are provided with weighted 2G serving tonorinallyswing'the-weighted casing 29 provided with an aperture 32 in projectible.

' ment of the weighted governor arms 23 tothe governor arms inwardly. The sleeve 2O is Vsplined at?? for axial sliding-'movement onr a tubular boss 28 forming a part of a casing 29, which is secured to the shaft D 'by a. set screw of the shaft D and the tubular boss 28. The

its outer endtlirough which the element-18 In use and operatioinwhen the cover B is closed and the opera-tor starts the machine y by turning the ina'niplating handleK to cause the shift-ing means to shift the belt I' on totlie live pulley G, the rotation of theshaft and the governor means therewith, causes, by centrifugal force, the outward swinging moveposit'ion illustratediii dottedlines lin Fig. 3. This movement of the governor arms "KB in aflocked closedk condition as long as the causes the segments 24 'to engage withl the end of the shaft :D and 4 tubular boss 28 and,

move the sleeve 20 'and frame V19 outwardly to project the element 18 through 'the aperture tion of the springl over the'gkeeper lug 14. This eiiectually locks and maintains the cover vmmachinefis in operation'. vlihen the machine is stopped byjswinging the handle K inv a vdirection to shift the belt I on to the idler Y' pulley H, the stopping'of the shaft D permits governor to aA normal position where the elethe weighted governor arms 23 to returnthe l `Lment18 is retracted allowing the spring 15 to function to swing the latch 10 to the dotted-line releasedposition illustrated in Fig.

1. In' view 0f the fact that the cover v,B Vin its Vopened condition obstruets ready access t0-the handle K, it isobvious thataccidental vstarting of the machine without first closing 'the cover B,'is. obviated.-

. In the form of the invention illustrated in jthis means consists Qta-sliding bolt 35- rnountvent starting ofthe inachine'with the cover opened, 'means actuatedv by thev cover is provided for prevent-ing the starting of the niachine when the cover is open. l As illustrated,

led abearing 36 and normally retracted 'by' a spring'- out;` of the path of movement of the vslide shaft N which carries the shifting When the cover' is in closed condition as.

illustrated in Figs. 5 and 6, the low point or surface e() of the cam is disposed in a posi- Y 1 tion top'ermit thespring 87 to move the slid-V or equivalent means 3,0 for .rotation with the x shaft.. 'The' segmentv arms 24- are provided with cai'n terminals 31 which engage the ending bolt 35 inwardly to retract-the outer end handle' L may be employed to shift the slide jshafft N and shifting fork'M'in a position to .engage the belt I on the live pulley Gr for operating the-machine. In vthis form of the invention, the safety device or attachment previously'described in the first form of the 'invention is employed and operates in the saine manner for locking andiinaintaining the "cover in locked position untilgythe machine.

stops. .K

vWhat is claimed is:

f 1. In Va power' operated 'extractorvorthev like having a casing and al cover, me'ansfor "locking the said cover Vin closed condition,

comprising a pivoted lock adapted for movement respectivelv to locking and un` 'locked positions for o structing and permitting opening Vmovement of the cover, means for normally swinging the lock arm to an unlocked .positioii, and, centrifugally actuated means carried by' a rotating part of themachine for engaging and swingingthe lock.;

arni to aI locked position, said'eentrifugally actuated means. comprising ya casing operai tively connected with a rotating part of the inachinefor rotation, said casing lhaving an axially extending internal support, a member splined thereon'forrotation therewith and for axial sliding movement,we-ighted'arrns pivoted thereto, said arms having camgterniinals engageable with 'said support and adapted upon Voutward swinging'inovement of the'arms lby, centrifugal force to slide the member axially, and an actuator element carried by said member and engageable with the lock arm forv moving the same.

2. In a power operated extractor or the like having a` casingand a cover. means for locking .the said cover in closed condition, coii'iprisingV a pivoted lock arm adapted for movement respective-ly to locking and unlocked positions for obstructing and permitting openi'ng'inovernent of the cover, means for normally swinging the lock armto'an unlocked position, and centrifugally actua-ted means carried by a rotating' part of the machine for engaging and swinging theflock arm toa locked posit-ion, said centrifugally actuated means comprisinga casing" operativelyV connected withV a rotatingpart of the machinel for'l rotatiomsaid casing having an 1,697,798 Y i 3 i axially extending internal support, a member splined thereon for rotation therewith and for axial sliding movement, Weighted arms pivoted thereto, said arms having cam terminals engage-ablel with said support and adapted upon outward swinging movement of the arms by centrifugal force to slide the member axially, and an actuator element'oarried by said member and engageable Withv the lock arm for moving'the same, the said cam terminals having toothed interengagingfsegment portions.

CHARLES W. TERWILLIGER. 

